Bellows for pneumatically-operated musical instruments



A. P. GUSTAFSON. BELLOWS FOR PNEUMATICALLY OPERATED MUSICAL INSTRUMENTS.

APPLICATION FILED MAY 29. I9IB- 1,398,730.

Patented Nov. 29, 1921.

- Q MW UNITED STATES PATENT OFFICE.

ADOLPH P..GUST.AFSON, OF CHICAGO, ILLINOIS, ASSIGNOR IO M. SCHULZ (10.,OF

CHICAGO,

ILLINOIS.

BELLOWS FOR PNEUMATICALLY-OPERATED MUSICAL INSTRUMENTS.

Application filed May 29,

To all whom it may concern:

Be it known that I, AnoLrH P. GUSTAF- son, a citizen of the UnitedStates, residing at Chicago, in the count-y of Cook and State ofIllinois, have invented a certain new and useful Improvement in Bellowsfor Pneumatically- Operated Musical Instruments, of which the followingis a full, clear, concise, and exact description, reference being had tothe accompanying drawings, forming a part of this specification.

My invention relates to bellows for pneumatically operated musicalinstruments.

The principal object of the invention is to provide a simple, practicaland effective construction of bellows which may be easily andinexpensively constructed and which may also readily be accessible forpurposes of adjustment from the front of the musical instrument.

In the accompanying drawings Figure 1 is a front elevation of a bellowsfor musical instruments embodying my present invention, together withpedals for operating the same;

Fig. 2 is a cross section taken on line 22 in Fig. 1;

Fig. 8 is a view of a detail of construction;

Fig. 4: is cross section taken on line 4.-& in Fig. 3; and

Fig. 5 is a view of a modified form of construction.

In the drawings, and especially Figs. 1 to 1. inclusive, I show abellows A consisting of a front member 1, which is usually mounted in astationary manner in the musical instrument, and a rear member 2 whichis hinged at 3 to thefront member 1 and adapted to swing back and forthso as to produce the desired variation in wind pressure to operate themusical instrument. A spring I is shown acting upon the member 2 tendingto maintain the same in a normally forward position so that the bellowsmay be normally collapsed.

Pedals 5 are shown mounted in front of the bellows A and connecting oroperating rods 6 extend rearwardly from the pedals 5 for operating theswinging rear member 2, being connected therewith by links 7. Rods 8areextended between the pedals 5 and the front member 1 and connectedwith the same for holding said parts in position and permitting thepedals 5 to be swung up- Specification of Letters Patent.

Patented Nov. 29, 1921.

1918. Serial No. 237,220.

wardly into position in front of the front member 1.

Valves 9 are provided in the front member 1 and control ports 10 whichestablish communication between the outside air and the interior of saidbellows A. The number of ports 10 may be varied. I have shown four suchand have accordingly shown the valve 9 to be of substantial size so asto control by opening and closing all of said ports 10. The valve 9 ispreferably provided with a guide pin 11 adapted to fit in acorresponding aperture 12 in the member 1 to guide said valve 9 in itsmovement to open and close the ports 10. A spring 13 is arranged to actupon the valve 9, tending to hold the same normally in a closed positionagainst the member 1. The spring 12 is heldin position by a staple orclip 14 driven into the member 1. The spring 13 is provided at one endwith a small loop 15 adapted to fit over and engage the outer end 11 ofthe pin 11. The valve 9 is preferably in the form of a flat circulardisk with a layer 16 of leather or similar material to make a tightjoint with the surface of the member 1.

Thus it will be seen that in the operation of the pedals 5 the rearmember 2 will be swung back and forth and the operation of the bellowswill cause the valves 9 to be moved forwardly and rearwardly so as toopen and close the ports 10 in accordance with the requirements of thepneumatic pressure within the same. These valves 9 being on the front ofthe bellows are readily accessible so that they may be adjusted,repaired or changed as may be required. Furthermore, they are muchsimpler, more accurate and satisfactory in construction and operationthan leather straps which have heretofore been used in this connection.

In Fig. 5 I show the valve 9 applied to the rear member 2. This may bedoneif desired, although it is preferable to apply it to the frontmember in order that it may be accessible.

It will be understood that changes and modifications may be made withoutdeparting from the spirit of the invention.

What I claim is:

1. In a bellows for player pianos, in com bination, a front exposedstationary member having a. plurality of ports communicating with theinterior of the bellows and a valve mounted entirely on the exposedfront face of said member and controlling said ports.

2. A bellows having its exposed front member provided with portscommunicating with the interior of the bellows and valve mechanism onthe front exposed face of said member for controlling said ports, saidvalve mechanism'having a slidable mounting per- 'mitting it to openin aforwardly direction. 10 f' 3. In a bellows for player pianos, incombination, a stationary exposed front member and a hidden rear movablemember thereoma plurality of po'its'in the exposed front member and aValve operating entirely externally of the front member on the exposedface thereof for controlling said ports.

In witness whereof I hereunto subscribe my name this 12th day of MarchA. 1)., 1918.

